Pneumatic truck tire changing device



(. C. BROWN.

PNfuMAnc muon ma cumsm navxce.

APPLICATION FILED OCT. 2 1920.

Patented May 16, 1922.

3 SHEETS-SHEET I 31a/pento:

C. 'owfl).

hmmm I G. c.. BROWN. l PNEUMATIG TRUCK TIRE CHANGING DEVICE. APPLICATION FILED OCT- 2 T920'.

1,415,865; Fatemi May 16,1922.

3 SHEETS-SHEET 2.

G. C. BROWN.

PNEUMATIC TRUCK TIRE CHANGING DEVICE.

APPLICATION FILED ocT. 2. Iszo. 1,415,865,` Patented May 16, 1922.

` 4 4 SHEETS-sneu a.

l?. Ik. of

j UNITEDAsrarris` pp AprENT OFFICE.

GUY c. BROWN, or Waco, TEXAS..

PNEUMATIC TRUCK V'IIRJ-Er CHANGING DEVICE.

i To clwmmttnmg/ concern:

Be it known that l', GUY C. EnowN, citizen of the United States, residing at llVaco,\in the county of McLennan and State of Texas, have invented certain new and useful Improvements in Pneumatic Truck Tire Changing Devices, of which the following is a specification.

This invention relates to an improverflf pneumatic truck tire changing device and has as one of its principal objects to pro-v vide a device ofthis character whereby the heavy, stiff and unwieldy tires of motor trucks may be readily removed.

A further object of the invention is to provide a device for supporting an assembled tire and` rim clear of the ground in such position that after the tire has been freed, said tire may simply be pushed downwardly from around the rim.

. .A still further object of the invention is to `jirovide a device wherein the tire supw `poi-ting means employed will, be equipped with an ejector for pushing the casing of the valve of the tube inwardly through the rim so that thisoperation may first be read? ily accomplished for permitting subsequent disengagement of the tire from around the rim.

The invention has as a 'further object to provide a device wherein the ejector will beequipped with means for disengaging the valve casing therefrom so that after the casing has been pushed inwardly into the tire, the free end of the casing may be caused to lodge against a side'of the tire and thus prevented from following the ejector back through` the valve opening in the rim when the ejector is retracted.

And the invention has as a still. further object to provide a device wherein the ejector may be adjusted for operating against the valve casings of different sized tires. j

`Other and incidental objects will appear hereinafter.

ln the drawings: j

Figure l a perspective view of my improved device.` i i y Figure 2 is a sectional view showing a con- `ventioiurl truck tire and rim in `position upon the device, y

Figure 8 is an enlarged fragmentary section `showing the ejector ofthe device moved to push the valve casing of the inner tube of a tire inwardly into the tire,

speciacauon of Letters Patent. Patented May 16, 192% Application filed October 2, 1920. Serial No.

are S0 very heavy, stiff and unwieldy. vWhen such a tire with its rim is laid upon the ground, it becomes difficult to properly grasp the tire as well as unhandy and la,- borious to work thereon. Further. one of the greatest difficulties experienced is to ac complish the inward removal of the valve casing through. the rim into the tire so that the tire may be later shifted laterally from around the rim. Very often the valve casing at the point where said casing passes through the rim becomes rusted, causing the casing to stick and mud and other foreign matter not infrequently collects about the casing at the rim to render the shifting of the casing inwardly into the tire very troublesome. The present invention, therefore, seeks to overcome these various diiii culties so that by the use of the device, a tire may be quickly removed from its rim with ease and facility.

In carrying the invention into effect, I employ a suj'iporting stand which includes an annulus l0 which is formed ink its upper margin atene side thereof with a notch `1l while from the lower margin of said annulus projects an outwardly directed radial flange 12. Formed on or otherwise secured to the inner face of the annulus is a plurality of keepers or loops 13 in which are threaded set screws 14.. The keepers are equally spaced At its outer end the bracket is formed with a yoke 18 and pivoted upon said yoke is a lever 19. As clearly shown in Figure 1, this lever is provided with a series of vertically spaced openings 20 therein and selectively engageable through said openings is a pivot boltI l21 swingingly connectingl the lever with the yoke. The lever is formed with a laterally directed upper end portion inclined away `from the annulus 10 and pivoted thereon is'anejector barrel 22. This barrel is formed at its inner end with a yoke 23 straddling the upper rend of the lever and engaging-'through VJthe arms of the yoke and through the lever is a pivot pin 24 swingingly connecting the barrel with the lever to normally extendradially outward therefrom toward the vannulus 10. Rising' from' the arms of the ,yoke at ytheir vinner 'ends is a pair of forwardly inclined lugs 25 and pivoted upon said lugs to swing therebetween is, as particularly shown in Figure 6, a hell Il crank 26 having a depending short arm and arearwardly directed long arm.Y Slidable through the barrel 22 is a plunger 27 pivotally connected at its inner end to the free end portion of the short arin of the bell i crank. This plunger is provided at its outer notch 1l of theannulus.

end with a rounded tip 28 and, as will now be readily seen, the bell crank may be rocked for' projecting the plunger at the outer end of the barrel or retracting the plunger within the barrel. In. this connection it is to be observed that whenthe plunger is disposed in its normal retracted position,'the short arm of -the bell crank will contact the lat erally "inclined upper end portion lof the lever 19'at its upper edge for supporting the ejector barrel in. substantially horizontal position so that when the upper end portion ofthe lever is swung forwardly the barrel ofthe ejector will be projected through the Owing to the presence of the series of openings 20 in the lever, said .lever may, as will be readily understood, be adjusted verticallyl upon the bracket 16 for varyingthe normal heightof l; the ejector with respect to the annulus and since the lever is pivoted near its upper end upon the bracket, the lower end portion of the lever ywill providey a weight operating to retract the barrel when the lever has been "l swung so that the barrel ofthe ejector will normally be held within the annulus spaced therefrom in a position out of the way` In order to clearly bring out the operation of my improved device and its niannerof i use 4I have, in the drawings, shown a conventional j pneumatic truck tire and rim in connection therewith. Thetne is indicated at `29 and the rim at 30, the rim being shown as having its removable side flange displaced.

` An vordinary[inner tube 3,1 is shown within f hejthire` casing and, as usual, this inner tube 1.5 feguipped with avalve having a casing 32 vAs will be appreciate which normally projects freely through a valve opening in the riin and in threaded at its outer end to receive the cunniumry cap To remove the tire from hc riin, the detachable side `liange of the rnn is tiret displaced when the rim with the tire thereon is, as shown in Figure 2, tted over the anM nulus 10 of the stand to engage the unohstructed edge of the rim with the flange 12 of the annulus, the valve casing 32 beingr received through the notch ll in the annulus. The stand will then support the riin und tire in convenient position. Accordingly, the lever 19 may he rocked to swing the upper end thereof forwardly and eni the barrel 22 of the ejector with the cap lll o l' the vnlvc casing 32, the plunger 2T being, of course, retracted and the cup projecting into the outer end portion of the barrel. The annulus is of a diameter to receive the average truck tire rim and by adjusting the lever 19 vertically, as previously explained, the barrel may be positioned to properly coact with the valve casings of different sized tires. As will be appreciated, variation in the transverse diameter ol. different tiren and corresponding variation in the width nl' the rimsy therefor will produce variata-e in the elevation of the valve casings with respect lo the annulus. After having thus angered the barrel 22 with the vulve casing cap 34, thc rocking movement of the lever l5) may he continued, as shown 'in Figure 2l, `lor cjccting the valve casing from within the opening fi of the rini and pusl'iing the vulve casing in wardly within the tire, the barrel o the ejector beingof a sia/,e to be V'i'ocljj rccciwd through the valve opening of thi,` rim. will be seen, inward displacement of the valve casing may thus he readily accomplished and, of course, in order to prrwcnt the valve casing troni following the ejector barrel back out through the openingolY the rini when the ejector is retracted. it he comesI necessary lo discngugc the cap nl' lhc valve casing from the ejecor hn rlcl and die locate the casing with vesper lo the opening 33. The bell crank 2G is then. :is `shown in Figure 4.-, depresse-fl tor shitting' he plunger 27' forwardly a the lip thereoi the end of the barrel. fr'nnvuril ninvcnicnl of the plunger will io push the n inwardly out of the r, d end prntion et the barrel and due to the in, ne et' the rounded tip 2S upon thc plunger, the up will, under the yieldahle influence ol' llu inner tube,ri de off ofthe plunger und engage against a side of the tire cnf-ung. The vulve casing will thus be reused to lodge within the tire so that the plunger inay he retracted and the lever 19 released when said lever will, as shown in Figure 5, return to its normal position and retract the ejector barrel. As shown in this figure, the tire may i ro i ecti n c l. l ll :lill

then be pushed downwardly from around the rim and easily disengaged therefrom. I accordingly provide a device wherein stift' and heavy pneumatic truck tires may be readily removed from the rims thereof.

Having thus described the invention, what claimed as new is l. A `device of thecliaracter described including means for supporting a demounted wheel rim, and means for ejecting the valve casing of a tire through the rim.

2. A device o1 the character described including means for supporting a deinounted wheel rim, means for ej ecting` the valve casing of a tire through the rim into the tire, and means for disengaging the free end portion of the casing fromthe first means.

23. A device of the character described including means for supporting a demounted wheel rim, means for ejecting the valve casing of a tire through the rim into the tire, and means for disengaging the casing from the rst means and comprising means whereby the casing `will ride out ofengagement therewith.

4. A device of the character described in cluding means for supporting a demounted `wheel rim, and an ejector operable for shifting the valve casing of a tire outwardly through the rim into the tire and comprising means for disengaging the casing from the ejector.

` 5. A device of the character described ini `cluding means for supporting a demounted .wheel rim, and an ejector operable for shifting the valve casing of a tire outwardly `through the rim into the tire and comprising a plunger for disengaging the casing from the ejector. 6. A device of the character described i'n cluding means for supporting a d'emounted wheel rim,` and an ejector operable for shifting the valve casing of a tire outwardly through the rim into theftire and compris ing means for disengaging the casing from the ejector, thelatter means being .formed with a working face whereby the free end portion of the casing will ride thereover laterally within the tire. j

7. A device of the character described i11- cluding means for supporting a demounted rim, and means carried by the first means for ejecting a tire valve casing outwardly through a rim upon the first means.

8. A device of the character described including an annulus for supporting a de- `mounted rim, and means carried by said annulus for ejecting a tire valve casing outwardly through a rim upon the annulus.

9. .A device ot the character described iii-- cluding a stand for supporting a demounted rim, and means carried by the stand for ejecting a tire valve casing outwardly through a rim upon t-he stand.

10. A device of the character described .including an annulus for supporting a demounted rim, and an ej ector carried thereby and operable for shifting a tire valve casing outwardly through a rim upon the annulus and freeing the casing.

ll. A device of the character described including a stand for supporting a deinounted rim, and means carried thereby and operable for shifting a tire `valve casing outwardly through a rim upon the stand and 'freeing the casing.

l2. A device of the character described including rim supporting means, a pivoted lever carried thereby, an ejector barrel mounted upon the lever and movable thereby outwardly beyond said means, and a plunger shiftable within the barrel.

13. A device of the character described including rim supporting means, a pivoted lever carried thereby, an ejector barrel piv'oted upon said lever and movable there by outwardly beyond said means, a plunger shiftable within the barrel, and a lever j pivoted upon the barrel and connected to the plunder for shifting the plunger.

14. A device of the character described including rim supporting means, a pivoted lever carried thereby, an. ejector barrel mounted upon the lever and .movable thereby outwardly beyond said means, and a `plunger shiftable within the barrel, the

plunger being provided. with a rounded tip projectable at the outer end of the barrel.

15. A device of the characterdescribed including an annulus provided with an opening. abracket secured to the annulus near said opening, a lever pivoted upon the bracket, an ejector barrel pivoted upon said. lever and movable thereby through the opena plunger shiftable within the barrel. 

